*4.2.4 Individual's features*

The data collected for each individual in this study contained details regarding the age, gender, weight, ethnicity, basal BMI, basal fasting glucose, fasting glucose after intervention, basal fasting insulin and fasting insulin after intervention. Details of the intervention such as intervention's name and duration were also included for each individual. For being able to train and learn from the data the features 'fasting glucose after intervention' and 'fasting insulin after intervention' must be excluded. A calculated feature named 'HOMA-IR difference' was added to the training vector. This feature was calculated as follows: if the intervention is successful we expect a reduction in HOMA-IR; thus, if the HOMA-IR difference is greater than zero the assignment in the 'HOMA-IR difference' column is set to TRUE otherwise it is FALSE. The final training vector included the ten following features: age, gender, weight, ethnicity, basal BMI, basal fasting glucose, basal fasting insulin, intervention's name, intervention's and HOMA-IR difference.
